资料来源 : Webster's Revised Unabridged Dictionary (1913)

Watermelon \Wa"ter*mel`on\, n. (Bot.)
   The very large ovoid or roundish fruit of a cucurbitaceous
   plant ({Citrullus vulgaris}) of many varieties; also, the
   plant itself. The fruit sometimes weighs many pounds; its
   pulp is usually pink in color, and full of a sweet watery
   juice. It is a native of tropical Africa, but is now
   cultivated in many countries. See Illust. of {Melon}.

资料来源 : WordNet®

Citrullus vulgaris
     n : an African melon [syn: {watermelon}, {watermelon vine}]